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Harmon Kardon unlock error

I have a Harmon Kardon surround stereo system, which is connected to a panasonic projector through a helios DVD player. I cant hear any sound cause some stupid error message keeps saying "Unlock" after i select a surround sound mode. HELP ME!!! =)

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  • panther3347 Dec 04, 2008

    I have the same problem. MY Harmon Kardon AVR 645 just seems to have quit all of a sudden neither my cable tv or my dvd player works. The receiver keeps flashing UNLOCK. I tried a different HDMI cable incase I had a bad cable but no luck. Please help.

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I have the same problem. All of a sudden no sound through my TV connection (but through the DVD connection the sound was still working). I changed the connection from video 1 to video 2 and got the sound back. It is not a real solution, but a practical one :-)

Posted on Feb 01, 2009

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Cheers,
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